Index: sys/dev/ic/sl811hs.c
===================================================================
RCS file: /cvsroot/src/sys/dev/ic/sl811hs.c,v
retrieving revision 1.93
diff -u -p -r1.93 sl811hs.c
--- sys/dev/ic/sl811hs.c	1 Jul 2016 09:03:28 -0000	1.93
+++ sys/dev/ic/sl811hs.c	25 Aug 2016 16:55:03 -0000
@@ -920,6 +920,11 @@ slhci_start(struct usbd_xfer *xfer)
 		else
 			spipe->buffer = NULL;
 		spipe->lastframe = t->frame;
+		if (spipe->ptype == PT_INTR) {
+			spipe->frame = spipe->lastframe +
+			    spipe->pipe.up_interval;
+		}
+
 #if defined(DEBUG) || defined(SLHCI_DEBUG)
 		if (__predict_false(spipe->ptype == PT_INTR &&
 		    xfer->ux_length > spipe->tregs[LEN])) {